UIToolKit test

.github/workflows/package.yaml

@@ -14,7 +14,7 @@ jobs:
     steps:
       # Checkout
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v2
         with:
           lfs: true
 
@@ -39,7 +39,7 @@ jobs:
 
       # Upload
       - name: Upload .unitypackage
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v2
         with:
           name: Unity Package
           path: Build

.github/workflows/release.yaml

@@ -18,7 +18,7 @@ jobs:
     outputs:
       sha: ${{ steps.commit.outputs.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Output package.json (Before)
         run: cat ${{ env.TARGET_FILE}}
 
@@ -69,7 +69,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - run: echo ${{ needs.update-packagejson.outputs.sha }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
         with:
           ref: ${{ needs.update-packagejson.outputs.sha }}
 
@@ -97,7 +97,7 @@ jobs:
         working-directory: .
 
       # Store artifacts.
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v2
         with:
           name: SerializeReference-Extensions.unitypackage
           path: ./Build/SerializeReference-Extensions.unitypackage
@@ -119,7 +119,7 @@ jobs:
           prerelease: false
 
       # Download(All) Artifacts to current directory
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v2
       
       # Upload to Releases(unitypackage)
       - uses: actions/upload-release-asset@v1

Assets/Example/Example.cs

@@ -1,3 +1,4 @@
+#if UNITY_2019_3_OR_NEWER
 using System.Collections.Generic;
 using System;
 using UnityEditor;
@@ -41,17 +42,6 @@ public class Grape : Food
 	}
 }
 
-[Serializable]
-[HideInTypeMenu]
-public class Banana : Food
-{
-	public Banana ()
-	{
-		name = "Banana";
-		kcal = 100f;
-	}
-}
-
 public class Example : MonoBehaviour
 {
 
@@ -70,8 +60,7 @@ public class Example : MonoBehaviour
 	[SerializeReference, SubclassSelector]
 	public Food foodTwo = new Peach();
 
-	// UseToStringAsLabel support on UNITY_2021_3_OR_NEWER
-	[SerializeReference, SubclassSelector(UseToStringAsLabel = true)]
+	[SerializeReference, SubclassSelector]
 	public Food foodThree = new Grape();
 
 	[SerializeReference]
@@ -127,3 +116,5 @@ public class AppleDrawer : PropertyDrawer
 	}
 }
 #endif
+
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/AdvancedTypePopup.cs

@@ -1,4 +1,5 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using System.Linq;
 using System.Collections.Generic;
 using UnityEngine;
@@ -137,3 +138,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/MackySoft.SerializeReferenceExtensions.Editor.asmdef

@@ -12,7 +12,9 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [],
+    "defineConstraints": [
+        "UNITY_2019_3_OR_NEWER"
+    ],
     "versionDefines": [],
     "noEngineReferences": false
 }

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/ManagedReferenceUtility.cs

@@ -1,4 +1,5 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using System.Reflection;
 using UnityEditor;
 using UnityEngine;
@@ -44,3 +45,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/PropertyDrawerCache.cs

@@ -1,4 +1,5 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using System.Collections.Generic;
 using UnityEditor;
 using System.Reflection;
@@ -78,3 +79,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SerializedPropertyExtensions.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+#if UNITY_2019_3_OR_NEWER
+using System.Collections.Generic;
 using UnityEditor;
 
 namespace MackySoft.SerializeReferenceExtensions.Editor
@@ -27,3 +28,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 		}
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SubclassSelectorDrawer.cs

@@ -1,9 +1,12 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using System.Linq;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 using UnityEditor.IMGUI.Controls;
+using UnityEngine.UIElements;
+using UnityEditor.UIElements;
 
 namespace MackySoft.SerializeReferenceExtensions.Editor
 {
@@ -21,7 +24,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 		}
 
 		const int k_MaxTypePopupLineCount = 13;
-		
+		static readonly Type k_UnityObjectType = typeof(UnityEngine.Object);
 		static readonly GUIContent k_NullDisplayName = new GUIContent(TypeMenuUtility.k_NullDisplayName);
 		static readonly GUIContent k_IsNotManagedReferenceLabel = new GUIContent("The property type is not manage reference.");
 
@@ -42,19 +45,6 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 				foldoutLabelRect = EditorGUI.IndentedRect(foldoutLabelRect);
 				Rect popupPosition = EditorGUI.PrefixLabel(foldoutLabelRect, label);
 
-#if UNITY_2021_3_OR_NEWER
-				// Override the label text with the ToString() of the managed reference.
-				var subclassSelectorAttribute = (SubclassSelectorAttribute)attribute;
-				if (subclassSelectorAttribute.UseToStringAsLabel && !property.hasMultipleDifferentValues)
-				{
-					object managedReferenceValue = property.managedReferenceValue;
-					if (managedReferenceValue != null)
-					{
-						label.text = managedReferenceValue.ToString();
-					}
-				}
-#endif
-
 				// Draw the subclass selector popup.
 				if (EditorGUI.DropdownButton(popupPosition, GetTypeName(property), FocusType.Keyboard))
 				{
@@ -69,7 +59,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 					Rect foldoutRect = new Rect(position);
 					foldoutRect.height = EditorGUIUtility.singleLineHeight;
 
-#if UNITY_2022_2
+#if UNITY_2022_2_OR_NEWER
 					// NOTE: Position x must be adjusted.
 					// FIXME: Is there a more essential solution...?
 					foldoutRect.x -= 12;
@@ -122,6 +112,21 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 			EditorGUI.EndProperty();
 		}
 
+		public override VisualElement CreatePropertyGUI (SerializedProperty property)
+		{
+			VisualElement root = new VisualElement();
+			if (property.propertyType == SerializedPropertyType.ManagedReference)
+			{
+				TypePopupField typePopupField = new TypePopupField(property, new VisualElement());
+				root.Add(typePopupField);
+			}
+			else
+			{
+				return new Label(k_IsNotManagedReferenceLabel.text);
+			}
+			return root;
+		}
+
 		PropertyDrawer GetCustomPropertyDrawer (SerializedProperty property)
 		{
 			Type propertyType = ManagedReferenceUtility.GetType(property.managedReferenceFullTypename);
@@ -141,7 +146,13 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 				Type baseType = ManagedReferenceUtility.GetType(managedReferenceFieldTypename);
 				var popup = new AdvancedTypePopup(
-					TypeMenuUtility.GetTypes(baseType),
+					TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
+						(p.IsPublic || p.IsNestedPublic) &&
+						!p.IsAbstract &&
+						!p.IsGenericType &&
+						!k_UnityObjectType.IsAssignableFrom(p) &&
+						Attribute.IsDefined(p,typeof(SerializableAttribute))
+					),
 					k_MaxTypePopupLineCount,
 					state
 				);
@@ -211,3 +222,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypeMenuUtility.cs

@@ -1,25 +1,12 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using System.Linq;
 using System.Collections.Generic;
-using UnityEditor;
 
 namespace MackySoft.SerializeReferenceExtensions.Editor {
 	public static class TypeMenuUtility {
 
 		public const string k_NullDisplayName = "<null>";
-		static readonly Type k_UnityObjectType = typeof(UnityEngine.Object);
-
-		public static IEnumerable<Type> GetTypes (Type baseType)
-		{
-			return TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
-				(p.IsPublic || p.IsNestedPublic || p.IsNestedPrivate) &&
-				!p.IsAbstract &&
-				!p.IsGenericType &&
-				!k_UnityObjectType.IsAssignableFrom(p) &&
-				Attribute.IsDefined(p, typeof(SerializableAttribute)) &&
-				!Attribute.IsDefined(p, typeof(HideInTypeMenuAttribute))
-			);
-		}
 
 		public static AddTypeMenuAttribute GetAttribute (Type type) {
 			return Attribute.GetCustomAttribute(type,typeof(AddTypeMenuAttribute)) as AddTypeMenuAttribute;
@@ -55,3 +42,4 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 	}
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypePopupField.cs

@@ -0,0 +1,59 @@
+#if UNITY_2019_3_OR_NEWER
+using UnityEditor;
+using UnityEngine.UIElements;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
+	public sealed class TypePopupField : BaseField<object>
+	{
+
+		public new static readonly string ussClassName = "unity-base-popup-field";
+
+		public static readonly string textUssClassName = ussClassName + "__text";
+
+		public static readonly string arrowUssClassName = ussClassName + "__arrow";
+
+		public new static readonly string labelUssClassName = ussClassName + "__label";
+
+		public new static readonly string inputUssClassName = ussClassName + "__input";
+
+		readonly SerializedProperty m_Property;
+
+		readonly Toggle m_Toggle;
+
+		readonly VisualElement m_ArrowElement;
+		readonly Label m_TextElement;
+
+		public TypePopupField (SerializedProperty property, VisualElement visualInput) : base(property.displayName, visualInput)
+		{
+			m_Property = property;
+
+			style.flexDirection = FlexDirection.Row;
+			style.flexShrink = 0;
+			style.flexGrow	= 1;
+
+			AddToClassList(ussClassName);
+			AddToClassList("unity-base-field__aligned");
+			AddToClassList("unity-base-field__inspector-field");
+			
+			labelElement.AddToClassList(labelUssClassName);
+			labelElement.AddToClassList("unity-popup-field__label");
+			labelElement.AddToClassList("unity-property-field__label");
+
+			m_TextElement = new Label(property.displayName)
+			{
+				pickingMode = PickingMode.Ignore
+			};
+			m_TextElement.AddToClassList(textUssClassName);
+			visualInput.AddToClassList(inputUssClassName);
+			visualInput.Add(m_TextElement);
+			visualInput.pickingMode = PickingMode.Ignore;
+
+			m_ArrowElement = new VisualElement();
+			m_ArrowElement.AddToClassList(arrowUssClassName);
+			m_ArrowElement.pickingMode = PickingMode.Ignore;
+			visualInput.Add(m_ArrowElement);
+		}
+	}
+}
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypePopupField.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 9f48f5d86a108b94a9c26381f5ce678c
+guid: ad665a39f1251a14ea9f40c0c9cf3a75
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/AddTypeMenuAttribute.cs

@@ -1,4 +1,6 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+
+using System;
 	
 /// <summary>
 /// An attribute that overrides the name of the type displayed in the SubclassSelector popup.
@@ -33,3 +35,4 @@ public sealed class AddTypeMenuAttribute : Attribute {
 	}
 
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/HideInTypeMenuAttribute.cs

@@ -1,9 +0,0 @@
-using System;
-
-/// <summary>
-/// An attribute that hides the type in the SubclassSelector.
-/// </summary>
-[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Interface, AllowMultiple = false, Inherited = false)]
-public sealed class HideInTypeMenuAttribute : Attribute {
-
-}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/MackySoft.SerializeReferenceExtensions.asmdef

@@ -8,7 +8,9 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [],
+    "defineConstraints": [
+        "UNITY_2019_3_OR_NEWER"
+    ],
     "versionDefines": [],
     "noEngineReferences": false
 }

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/SubclassSelectorAttribute.cs

@@ -1,16 +1,12 @@
-using System;
+#if UNITY_2019_3_OR_NEWER
+using System;
 using UnityEngine;
 
 /// <summary>
 /// Attribute to specify the type of the field serialized by the SerializeReference attribute in the inspector.
 /// </summary>
-[AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
-public sealed class SubclassSelectorAttribute : PropertyAttribute
-{
-
-#if UNITY_2021_3_OR_NEWER
-	// NOTE: Use managedReferenceValue getter to invoke instance method in SubclassSelectorDrawer.
-	public bool UseToStringAsLabel { get; set; }
-#endif
+[AttributeUsage(AttributeTargets.Field,AllowMultiple = false)]
+public sealed class SubclassSelectorAttribute : PropertyAttribute {
 	
 }
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/package.json

@@ -2,7 +2,7 @@
 	"name": "com.mackysoft.serializereference-extensions",
 	"displayName": "SerializeReference Extensions",
 	"author": { "name": "MackySoft", "url": "https://github.com/mackysoft" },
-	"version": "1.5.0",
+	"version": "1.3.1",
 	"unity": "2021.3",
 	"description": "Provide popup to specify the type of the field serialized by the [SerializeReference] attribute in the inspector.",
 	"keywords": [ "SerializeReference", "Editor" ],

README.md

@@ -139,7 +139,7 @@ public struct StructCommand : ICommand {
 
 The `SubclassSelector` attribute supports types that meet the following conditions.
 
-- Public or nested private
+- Public
 - Not abstract
 - Not generic
 - Not unity object